HAL1501SU‑A  Bipolar Hall Effect Switch

Brand: TDK-Micronas (Germany)Full Name: Bipolar Hall Effect SwitchPackage: SOT-23 (3-pin SMD)

HAL1501SU

Ⅱ. Core Functions

It is a high-sensitivity, bipolar Hall switch IC with open-drain output. It realizes non-contact detection of magnetic polarity and position, and outputs digital switching signals.

✅ Bipolar triggering: Turn-on (BON ≈ +0.4 mT) by N-pole, turn-off (BOFF ≈ −0.4 mT) by S-pole

✅ High sensitivity: Switching with only ±4 Gauss magnetic field, ideal for small magnets and weak magnetic field detection✅ Wide operating voltage: 2.7 V ~ 24 V, compatible with automotive, industrial and household appliance power supply

✅ Open-drain output: Allow arbitrary pull-up voltage, capable of driving relays, LEDs and MOSFETs

✅ Ultra-wide temperature range & zero temperature drift: −40℃ ~ +170℃, temperature coefficient ≈ 0 ppm/K, stable performance in full temperature range

Ⅲ. Application Scope

1. Automotive Electronics (Core Application, AEC-Q100 Qualified)Car door / door lock position detection, trunk lockSeat position & seatbelt buckle detectionGear shifter position, brake pedal travel detectionWiper limit, headlight & rearview mirror position monitoringBLDC motor commutation, speed and pulse counting (fans, water pumps)

2. Industrial ControlEquipment limit & origin detection (replace mechanical switches for longer service life)Cylinder and valve position monitoring, manipulator stroke detectionEncoder, speed and pulse counting (flow rate & velocity monitoring)Magnetic detection for safety doors & covers, access control system

3. Home Appliances & Consumer ElectronicsMagnetic sensing for smart locks, drawers and cabinet doorsLid & slide detection for small appliances (rice cookers, sweeping robots, coffee machines)Speed and position monitoring for sports equipment (treadmills, exercise bikes)Battery compartment & charging cover detection, power on/off control for portable devices

Ⅳ. Electrical Parameters

Operating Voltage: 2.7 V ~ 24 VOperating Current: ≈1.6 mATrigger Point: BON +0.4 mT / BOFF −0.4 mT (±4 Gauss)Temperature Range: −40℃ ~ +170℃ (Automotive Grade)Output Type: Open-drain, Max. 25 mAESD Protection: ＞8 kV, excellent anti-static performance

Ⅴ. Selection Summary

HAL1501SU is a high-sensitivity, bipolar, wide-voltage and high-temperature resistant Hall switch.It is widely used in automotive, industrial and high-end home appliance scenarios requiring small magnet adaptation, weak magnetic detection, bipolar identification and 170℃ high temperature resistance.It can replace conventional Hall sensors such as A3144 and OH3144, and effectively solve the problems of insufficient sensitivity, obvious temperature drift and short service life.